The invention belongs to the technology of aircraft hydraulic systems, and relates to a hydraulic retracting and releasing device for an aircraft sled. Comprising a hydraulic oil tank, a hydraulic pump, a one-way valve, a hydraulic oil filter, a two-position three-way electromagnetic valve, a pressure sensor, a pressure regulating valve, a three-position four-way electromagnetic valve, a front sleigh throttle valve, a left sleigh throttle valve, a right sleigh throttle valve, a front sleigh actuating cylinder, a left sleigh actuating cylinder and a right sleigh actuating cylinder. And the sleigh can be retracted and released. When the airplane lands on the ice and snow covered pavement, the sleigh is put down, and the airplane lands through the sleigh. When the airplane lands on hard road surfaces such as sand and stones, the sled is folded, and the airplane lands through airplane wheel tires. A simulation model of the sled retracting and releasing system is established in simulation software, a curve of displacement and time is obtained according to loads in different flight states, the flow range of the adjustable throttling valve is determined, the range of the through-flow area of the throttling valve is calculated according to a small hole throttling formula, and the range of the through-flow area serves as the flow adjusting requirement of the adjustable throttling valve.

    本发明属于飞机液压系统技术,涉及一种飞机雪橇液压收放装置。包括液压油箱、液压泵、单向阀、液压油滤、两位三通电磁阀、压力传感器、调压阀、三位四通电磁阀、前雪橇节流阀、左雪橇节流阀、右雪橇节流阀,供给前雪橇作动筒、左雪橇作动筒、右雪橇作动筒。能够进行雪橇收放。飞机在冰雪路面着陆时将雪橇放下,通过雪橇进行着陆。飞机在沙石等坚硬路面着陆时将雪橇收起,通过机轮轮胎进行着陆。在仿真软件中建立雪橇收放系统的仿真模型,根据不同飞行状态下的载荷,得到位移与时间的曲线,确定可调式节流阀的流量范围,并根据小孔节流公式计算节流阀的通流面积的范围,将通流面积的范围作为可调式节流阀的流量调节要求。


    Access

    Download


    Export, share and cite



    Title :

    Hydraulic folding and unfolding device for airplane sled


    Additional title:

    一种飞机雪橇液压收放装置


    Contributors:
    WANG HONGZHI (author) / WANG QINGLI (author) / GU FENG (author) / LIN YUZHU (author) / LIU BINBIN (author) / ZHU BO (author)

    Publication date :

    2025-02-28


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B64C AEROPLANES , Flugzeuge



    Airplane fixed wheel type undercarriage sled folding and unfolding control device and method

    TAN JINGJIE / LI BAOLING / LI HAOHAN et al. | European Patent Office | 2024

    Free access

    Fixed-wing model airplane undercarriage folding and unfolding device with self-locking structure

    CHEN MUYAO / CHEN LIANG | European Patent Office | 2023

    Free access

    Folding and unfolding device

    LI HONGYUAN / LI BINGYANG / DUAN HUILING et al. | European Patent Office | 2023

    Free access

    Wing folding and unfolding device and wing folding and unfolding underwater vehicle

    WANG YANHUI / SUN TONGSHUAI / YANG YANAN et al. | European Patent Office | 2024

    Free access

    FOLDING AIRSHIP-AIRPLANE

    CHUGUNOV VALERIJ IVANOVICH | European Patent Office | 2021

    Free access